setup in Configuration/Audio/Output -> Internal Speakers -it should be there
Check if sound is working

And here is a full explanation
In attachment are the files that I have used.

Problems with USB3.0 and GraphicDriver/Clover boot still remain.

Also I don't know why once I got black boot screen with Clover Icons Boot1.jpg and other time this ugly Boot2.jpg. It does not affect the boot process.

With matts fix I have managed to install USB3.0, he has explained everything excellent and I have just followed his post.
And somehow, after I have successfully installed Audio I have no problems with booting system, I have shut it down for about 20 times till now and it starts every time normaly. I hope that everything is solved now.

I've updated with El Capitan - running fine - but can't (so far) get it to boot directly from the system disk. Booting with the USB in clover through to the main disk. When trying to boot from the system disk it goes into a continual loop bringing up the old Chameleon boot screen.

I'm guessing this means I need to remove Chameleon from the system disk?

I've updated with El Capitan - running fine - but can't (so far) get it to boot directly from the system disk. Booting with the USB in clover through to the main disk. When trying to boot from the system disk it goes into a continual loop bringing up the old Chameleon boot screen.

I'm guessing this means I need to remove Chameleon from the system disk?

Thanks, I have tried that, without getting it to work, unfortunately. I still count as a success, however, because I successfully readjusted my expectations - in other words, doesn't really matter to me that much whether I have to select the drive.

No luck with getting audio to work yet, however, and I'm so far not able to reset my expectations. Granted I don't use audio much on this machine but still annoying. I have tried the instructions in that same thread.

Newest version of multibeast resolved the automatic boot issue I was having - now works flawlessly.

Audio was fixed by an even more basic method: I plugged the audio into the correct port on the back panel.

[In my defence, the audio issue combined with a move where the speakers came out of the boxes last - after upgrading to El Capitan. Note to self about changing things with as few variables at a time as possible.]

I originally used Toleda's command script to restore audio with El Capitan. After fixing my iMessage issues, I lost audio again, and had a bear of a time getting it back.

the problem boiled down to not completely disabling Security before running the script. I had CSR value set at 0x11, but that was not allowing the script to modify kext contents. Once I set the CSR to 0x67, the script ran perfectly, and sound was restored.

I can't believe it took me two hours to actually read the install script log (somewhat) intelligently.